Vacuum cleaner



July 16, 1935. E. FABER VACUUM CLEANER.

Filed Dec. 11, 1934 0g 0 OWO OWOWO O 0 0 00 gig Patented July 16, 1935 UNITED STATES PATENT OFFICE Application December 11, 1934, Serial No. 757,063

In Germany December- 14, 1932 3 Claims.

rmsmvention relates to vacuum cleaners and more especially to the arrangement, in apparatus of the kind aforesaid, of the filter designed to free the air sucked through the apparatus from the bacteria existing therein. It is an object of my invention to provide means for mounting such filter in position in the cleaner casing in such manner that it can easily be withdrawn from, exchanged and/or reinserted in the casing, and, when mounted therein, will be packed tightly in the casing without requiring any separate fixation or packing means connected with this casing.

It is another object of my invention to provide a packing and fixing means for the filter which can easily be mounted on, and removed from, the filter and therefore allows readily exchanging the filter body proper whenever it is spent.

With these and other objects in view I will now proceed to describe my invention with reference to the drawing aifixed to this specification and forming part thereof, in which Fig. 1 is an elevation, partly in axial section, of a vacuum cleaner having a filter embodying my invention mounted therein; the filter and its combination with the cleaner being shown by way of example and in a purely diagrammatic manner. v

Fig. 2 is a cross section, drawn to a larger scale, on the line 2-2 in Fig. 1;

Fig. 3 is a cross section on the line 3-3 in Fig. 2, and

Fig. 4 is a partial cross section, 3, drawn to an enlarged scale.

Referring to the drawing, a is the cylindrical casing of the vacuum cleaner, mounted on rollers b, c, and comprising a removable conical cap d at the front end with a socket e for the insertion of the suction hose. Between this cap at and the casing 11 the dust filter bag 0 is clamped by means of clips 1' allowing to remove the cap and the dust filter. In the rear end of the casing a a cap h with a central socket-i for the discharge of the purified air or for the insertion of a blowing hose is mounted. In the casing a are further arranged an electro-motor k and a centrifugal blower 2 with casing m. The electro-motor and the casing 111. of the centrifugal blower are forced by means of springs n against a rubber ring 0 resting against a shoulder a: of the casing. 11. Thus not only the filter bag 9 but also the motor fan aggregate is removably mounted in the casing.

According to the invention the bacteria filter p is mounted in the casing in such manner that it can be readily removed, simply fixed in place similar to Fig.

'and reliably packed.-

q of U-shaped cross section and having a radiall0 ly projecting annular outer flange w is slipped over the metal ring'v. By means of the flange w of the rubber ring q the filter can be fixed as a whole in the casing of the vacuum cleaner with sufficient tension to be securely held in its 1 position. The ring-shaped flange w serves at the same time for securely packing the filter in the casing so that the air drawn through the dust filter g is compelled to flow through the bacteria filter 1). go

On the other hand the tension with which the filter bears against the casing is not so high as to prevent removal of the filter after the cap it and dust bag 9' have been removed from the easing. 25

In order to facilitate the removing of the bacteria filter a handle r is provided thereon.

The filter is removed whenever the bactericidal liquid with which the fabric u is impregnated, is spent so that it is necessary to again impregnate 30 the fabric or to insert a fresh filter or filter frame 0, t, u, t in the rubber ring (I. w-

Obviously the flexible flange portion 20 of the rubber ring greatly facilitates the insertion and removal of the filter while at the same time pro- 5 viding an absolutely tight packing in the plain wall of the casing which need not being formed with any separate means to hold the filter in place.

I wish it tobe understood that I do not desire 40 to be limited to the exact details of construction shown and described for obvious modifications will occur to a person skilled in the art.

I claim: g

1. In a vacuum cleaner, acasing, a bacteria 45 filter transversely mounted in said casing, and a rubber ring formed with an outwardly projecting flange, surrounding. said filter and bearing tightly against the inner wall of the casing, to pack the filter against said casing. r

2. In a vacuum cleaner, a casing, a bacteria filter transversely mounted in said casing, and a rubber ring of U-shaped cross section formed with an outwardly projecting flange, surrounding said filter and bearing tightly against the inner filter comprising twometal sieves, a layer of fabric impregnated with a bactericidal substance between said sieves and a metal ring of U-shaped cross section engaging'over the circumferential edges of said metal sieves and said fabric.

ERNST FABER. 

